Thermal fluctuations of the Josephson current in a ring of superconducting grains
D. A. Garanin, E. M. Chudnovsky
DOI 10.1103/PhysRevB.95.014520 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Thermal fluctuations of the Josephson current induced by the magnetic flux through a ring of N superconducting grains are studied. When a half-fluxon is threading the ring, I exhibits incoherent transitions between the two degenerate states due to thermal phase slips. We propose a numerical method to deal with both equilibrium and dynamic properties of Josephson systems. Computed transition rate has the form Γ=A(N)exp[−B(N)/T], where B(N) agrees with the analytical result derived for the energy barrier associated with phase slips. In the nondegenerate case (e.g., at a quarter-fluxon) the equilibrium value of I decreases with T due to harmonic excitations and then gets destroyed by phase slips.
Similar papers
Thermal fluctuations of the Josephson current in a ring of superconducting grains
similarity 0.94D. A. Garanin & E. M. Chudnovsky · 2016 · arXiv:1609.05241
Source status unknown — claims are unverified
Quantum phase slips in Josephson junction rings
similarity 0.90G. Rastelli et al.
Source status unknown — claims are unverified
Nonequilibrium fluctuation-induced phenomena in Josephson junctions
similarity 0.88Mark M. Millonas & Dante R. Chialvo
Source status unknown — claims are unverified
Fluctuation conductivity of high-Tc superconductors
similarity 0.88Kazumi Maki & R. S. Thompson
Source status unknown — claims are unverified
Josephson current through superconductor/diffusive-normal-metal/superconductor junctions: Interference effects governed by pairing symmetry
similarity 0.88Yasuhiro Asano et al.
Source status unknown — claims are unverified
Dynamic transitions and resonances in Josephson-junction arrays under oscillating magnetic fields
similarity 0.88Gun Sang Jeon et al.
Source status unknown — claims are unverified